uint8 ALT_PRESSURE_QNH=0
uint8 ALT_GEOMETRIC=1
uint8 EMITTER_NO_INFO=0
uint8 EMITTER_LIGHT=1
uint8 EMITTER_SMALL=2
uint8 EMITTER_LARGE=3
uint8 EMITTER_HIGH_VORTEX_LARGE=4
uint8 EMITTER_HEAVY=5
uint8 EMITTER_HIGHLY_MANUV=6
uint8 EMITTER_ROTOCRAFT=7
uint8 EMITTER_UNASSIGNED=8
uint8 EMITTER_GLIDER=9
uint8 EMITTER_LIGHTER_AIR=10
uint8 EMITTER_PARACHUTE=11
uint8 EMITTER_ULTRA_LIGHT=12
uint8 EMITTER_UNASSIGNED2=13
uint8 EMITTER_UAV=14
uint8 EMITTER_SPACE=15
uint8 EMITTER_UNASSGINED3=16
uint8 EMITTER_EMERGENCY_SURFACE=17
uint8 EMITTER_SERVICE_SURFACE=18
uint8 EMITTER_POINT_OBSTACLE=19
uint16 FLAG_VALID_COORDS=1
uint16 FLAG_VALID_ALTITUDE=2
uint16 FLAG_VALID_HEADING=4
uint16 FLAG_VALID_VELOCITY=8
uint16 FLAG_VALID_CALLSIGN=16
uint16 FLAG_VALID_SQUAWK=32
uint16 FLAG_SIMULATED=64
uint16 FLAG_VERTICAL_VELOCITY_VALID=128
uint16 FLAG_BARO_VALID=256
uint16 FLAG_SOURCE_UAT=32768
std_msgs/Header header
uint32 ICAO_address
string callsign
float64 latitude
float64 longitude
float32 altitude
float32 heading
float32 hor_velocity
float32 ver_velocity
uint8 altitude_type
uint8 emitter_type
duration tslc
uint16 flags
uint16 squawk